Image-Acquisition Method and Image-Capturing Device

Abstract

An image-acquisition method and an image-capturing device are disclosed. The method includes obtaining a depth image of a current scene; obtaining a visible-light image of the current scene; obtaining a current depth of a target object in the current scene according to the depth image and the visible-light image; obtaining a current overlapping degree for indicating a ratio of an overlapping region to a base region, wherein the overlapping region is an overlapping region between a field-of-view (FOV) region of the depth image at the current depth and a FOV region of the visible-light image at the current depth, and the base region is the FOV region of the visible-light image at the current depth; and triggering a prompt message for adjusting the current depth of the target object, in response to the current overlapping degree not being within a preset range.

What is claimed is: 
     
         1 . An image-acquisition method, comprising:
 obtaining a depth image of a current scene;   obtaining a visible-light image of the current scene;   obtaining a current depth of a target object in the current scene according to the depth image and the visible-light image;   obtaining a current overlapping degree for indicating a ratio of an overlapping region to a base region, wherein the overlapping region is an overlapping region between a field-of-view (FOV) region of the depth image at the current depth and a FOV region of the visible-light image at the current depth, and the base region is the FOV region of the visible-light image at the current depth; and   triggering a prompt message for adjusting the current depth of the target object, in response to the current overlapping degree not being within a preset range.   
     
     
         2 . The image-acquisition method as claimed in  claim 1 , wherein the method is applied in an image-capturing device comprising a visible-light camera and an infrared-light camera; and
 the obtaining the current overlapping degree for indicating the ratio of the overlapping region to the base region comprises:   obtaining the overlapping region between the FOV region of the depth image at the current depth and the FOV region of the visible-light image at the current depth according to the current depth, a FOV of the visible-light camera, a FOV of the infrared-light camera, and a preset distance between the visible-light camera and the infrared-light camera; and   calculating the ratio of the overlapping region to the FOV region of the visible-light image, to obtain the current overlapping degree.   
     
     
         3 . The image-acquisition method as claimed in  claim 2 , wherein when the preset distance is invariant, the current overlapping degree increases as the current depth of the target object increases. 
     
     
         4 . The image-acquisition method as claimed in  claim 2 , wherein when the current depth is invariant, the current overlapping degree decreases as the preset distance increases. 
     
     
         5 . The image-acquisition method as claimed in  claim 2 , wherein the overlapping region decreases as the preset distance increases when the current depth is invariant, the FOV of the visible-light camera is invariant, and the FOV of the infrared-light camera is invariant; or
 the overlapping region increases as the FOV of the infrared-light camera increases when the current depth is invariant, the FOV of the visible-light camera is invariant, and the preset distance is invariant; or   the overlapping region increases as the FOV of the visible-light camera increases when the current depth is invariant, the FOV of the infrared-light camera is invariant, and the preset distance is invariant.   
     
     
         6 . The image-acquisition method as claimed in  claim 1 , wherein the triggering the prompt message for adjusting the current depth of the target object comprises:
 triggering a first prompt message for increasing the current depth of the target object, in response to the current overlapping degree being less than a minimum value of the preset range; or   triggering a second prompt message for decreasing the current depth of the target object, in response to the current overlapping degree being greater than a maximum value of the preset range.   
     
     
         7 . The image-acquisition method as claimed in  claim 1 , wherein the first prompt message or the second prompt message is in a manner selected from at least one of text and voice. 
     
     
         8 . An image-capturing device, comprising:
 a depth-capturing assembly, configured for obtaining a depth image of a current scene;   a visible-light camera, configured for obtaining a visible-light image of the current scene; and   a processor, configured for:
 obtaining a current depth of a target object in the current scene according to the depth image and the visible-light image; 
 obtaining a current overlapping degree for indicating a ratio of an overlapping region to a base region, wherein the overlapping region is an overlapping region between a field-of-view (FOV) region of the depth image at the current depth and a FOV region of the visible-light image at the current depth, and the base region is the FOV region of the visible-light image at the current depth; and 
 triggering a prompt message for adjusting the current depth of the target object, in response to the current overlapping degree not being within a preset range. 
   
     
     
         9 . The image-capturing device as claimed in  claim 8 , wherein the depth-capturing assembly comprises an infrared-light camera; and
 the processor is further configured for:
 obtaining the overlapping region between the FOV region of the depth image at the current depth and the FOV region of the visible-light image at the current depth according to the current depth, a FOV of the visible-light camera, a FOV of the infrared-light camera, and a preset distance between the visible-light camera and the infrared-light camera; and 
 calculating the ratio of the overlapping region to the FOV region of the visible-light image, to obtain the current overlapping degree. 
   
     
     
         10 . The image-capturing device as claimed in  claim 9 , wherein when the preset distance is invariant, the current overlapping degree increases as the current depth of the target object increases. 
     
     
         11 . The image-capturing device as claimed in  claim 9 , wherein when the current depth is invariant, the current overlapping degree decreases as the preset distance increases. 
     
     
         12 . The image-capturing device as claimed in  claim 9 , wherein the overlapping region decreases as the preset distance increases when the current depth is invariant, the FOV of the visible-light camera is invariant, and the FOV of the infrared-light camera is invariant; or
 the overlapping region increases as the FOV of the infrared-light camera increases when the current depth is invariant, the FOV of the visible-light camera is invariant, and the preset distance is invariant; or   the overlapping region increases as the FOV of the visible-light camera increases when the current depth is invariant, the FOV of the infrared-light camera is invariant, and the preset distance is invariant.   
     
     
         13 . The image-capturing device as claimed in  claim 9 , wherein the triggering the prompt message for adjusting the current depth of the target object comprises:
 triggering a first prompt message for increasing the current depth of the target object, in response to the current overlapping degree being less than a minimum value of the preset range; or   triggering a second prompt message for decreasing the current depth of the target object, in response to the current overlapping degree being greater than a maximum value of the preset range.   
     
     
         14 . The image-capturing device as claimed in  claim 8 , wherein the first prompt message or the second prompt message is in a manner selected from at least one of text and voice. 
     
     
         15 . A non-transitory computer-readable storage medium storying thereon computer-executable instructions, when executed by one or more processor, causing the one or more processor to perform:
 obtaining a depth image of a current scene;   obtaining a visible-light image of the current scene;   obtaining a current depth of a target object in the current scene according to the depth image and the visible-light image;   obtaining a current overlapping degree for indicating a ratio of an overlapping region to a base region, wherein the overlapping region is an overlapping region between a field-of-view (FOV) region of the depth image at the current depth and a FOV region of the visible-light image at the current depth, and the base region is the FOV region of the visible-light image at the current depth; and   triggering a prompt message for adjusting the current depth of the target object, in response to the current overlapping degree not being within a preset range.   
     
     
         16 . The non-transitory computer-readable storage medium as claimed in  claim 15 , wherein the non-transitory computer-readable storage medium is applied in an image-capturing device comprising a visible-light camera and an infrared-light camera; and
 when the computer-executable instructions executed by the one or more processor, causing the one or more processor to further perform:   obtaining the overlapping region between the FOV region of the depth image at the current depth and the FOV region of the visible-light image at the current depth according to the current depth, a FOV of the visible-light camera, a FOV of the infrared-light camera, and a preset distance between the visible-light camera and the infrared-light camera; and   calculating the ratio of the overlapping region to the FOV region of the visible-light image, to obtain the current overlapping degree.   
     
     
         17 . The non-transitory computer-readable storage medium as claimed in  claim 16 , wherein when the preset distance is invariant, the current overlapping degree increases as the current depth of the target object increases. 
     
     
         18 . The non-transitory computer-readable storage medium as claimed in  claim 16 , wherein when the current depth is invariant, the current overlapping degree decreases as the preset distance increases. 
     
     
         19 . The non-transitory computer-readable storage medium as claimed in  claim 16 , wherein the overlapping region decreases as the preset distance increases when the current depth is invariant, the FOV of the visible-light camera is invariant, and the FOV of the infrared-light camera is invariant; or
 the overlapping region increases as the FOV of the infrared-light camera increases when the current depth is invariant, the FOV of the visible-light camera is invariant, and the preset distance is invariant; or   the overlapping region increases as the FOV of the visible-light camera increases when the current depth is invariant, the FOV of the infrared-light camera is invariant, and the preset distance is invariant.   
     
     
         20 . The non-transitory computer-readable storage medium as claimed in  claim 15 , wherein the triggering the prompt message for adjusting the current depth of the target object comprises:
 triggering a first prompt message for increasing the current depth of the target object, in response to the current overlapping degree being less than a minimum value of the preset range; or   triggering a second prompt message for decreasing the current depth of the target object, in response to the current overlapping degree being greater than a maximum value of the preset range.